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5th Generation Maxima (2000-2003) Learn more about the 5th Generation Maxima, including the VQ30DE-K and VQ35DE engines.

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Old 07-11-2006, 07:34 PM   #1
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P0300 and maf?

So I have had the P0300 (multiple cylinder misfire) code for about 4 days now and I have racked my brain for a fix. My idle has turned to complete crap, it misses from idle to any rpm. If I let it idle for a bit, it will die. No power whatsoever. I have searched the org for ideas from other members. I have replaced the fuel filter, had my injectors cleaned locally, checked the coils with an ohm-meter, replaced bank 1 primary o2 sensor, checked for manifold leaks, and swapped out the fuel pump with one I picked up from a salvage yard.

No luck.

I did notice that when I unplugged the maf sensor, my idle would go up, and it would run fairly good again.Wierd. So I took the sensor out of the housing and sprayed it down with some electrical connector cleaner, wiped out the housing and put everything back together. It now runs much better . Slight vibration at idle, and it feels like it is being held back from 4k to 5k a bit, but the rest of the powerband is great.

Has anyone else had similar symptoms, or had there maf sensor replaced due to a P0300 code?
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Old 07-11-2006, 07:38 PM   #2
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hmm, how weird...i never knew MAF could mess up the car like that? at least thats what the FSM says...the FSM lists no MAF failure leading to 0300 codes

there was a local guy that had his maf blown on his 2k2...his idle was crap but he still had some power...its just he couldn't rev past 2.5k...
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Old 07-11-2006, 07:47 PM   #3
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It would idle like crap, but it did have a bit of power until 2k then it would rev up still, but was real slow and had no *****. Good thing no metro's stepped to me, I would have had my *** handed to me.
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Old 07-12-2006, 11:58 AM   #4
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Interesting. I have had the P0300 code quite a bit lately. Most times it will go off by itself after a couple days and then return a few days later. I think my MAF is fine. No problem accelerating and it pulls to redline.

However, along with the P0300, I get P1456 (Evap system - small leak) I replaced my gas cap and checked the hoses at the evap box. Still getting those codes, though. I'd be interested to see what other's experiences have been.
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Old 07-13-2006, 10:24 AM   #5
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With the cleaned maf, I started getting p0171, bank 1 lean. I searched online, and found that this is a classic maf failure sign. So I went down to the stealership, and purchased a new 01 Maf. For those of you who don't know, the 01 maf is exactly the same as the 02-03 maf except that the 02-03 ones have the air intake temp sensor. Easy fix, it is a simple resistor that unplugs from the old maf, and plugs right into the 01 maf. After installing it I reset the ecu, and whoalla! No more codes, and it runs great again.

Paulb
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Old 06-24-2009, 08:58 AM   #6
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Ditto to the Max (arf arf)

The same thing is happening to my 03 Max. I've been getting P0300 and P0303 codes come and go for a year or two. About a month ago, my idle turned to crap, the car would shudder, and the SES would start blinking. I replaced all my plugs (117k on them) and the car ran great for about 3 weeks. I check all my coils w/ a DMM; those were fine. But after reading this and a ton of other threads where changing the MAF fixed all their problems, I ordered an MAF from a local junkyard. I'm being cheap because I'm not completely convinced it's the MAF, so I paid $75 for one with 80k on it. The cheapest I could find for a new aftermarket was like $300 w/ shipping. I probably should change the fuel filter, but I've got my fingers crossed that the MAF will be my long awaited panacea.

Wish me luck!

Quote:
Originally Posted by elgrande2003se View Post
So I have had the P0300 (multiple cylinder misfire) code for about 4 days now and I have racked my brain for a fix. My idle has turned to complete crap, it misses from idle to any rpm. If I let it idle for a bit, it will die. No power whatsoever. I have searched the org for ideas from other members. I have replaced the fuel filter, had my injectors cleaned locally, checked the coils with an ohm-meter, replaced bank 1 primary o2 sensor, checked for manifold leaks, and swapped out the fuel pump with one I picked up from a salvage yard.

No luck.

I did notice that when I unplugged the maf sensor, my idle would go up, and it would run fairly good again.Wierd. So I took the sensor out of the housing and sprayed it down with some electrical connector cleaner, wiped out the housing and put everything back together. It now runs much better . Slight vibration at idle, and it feels like it is being held back from 4k to 5k a bit, but the rest of the powerband is great.

Has anyone else had similar symptoms, or had there maf sensor replaced due to a P0300 code?
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Old 06-24-2009, 09:40 AM   #7
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Old 06-21-2013, 09:51 AM   #8
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i have the same issue...at first i had the MAF problem so it stated with codes p0113 and p0102. i purchased a new one (aftermarket) and it cleared the problem. no more SES then after a few miles of driving the SES came back on. Went back to the mechanic and NOW p0300 code came. I did feel a hesitation between 3500-4000. Mechanic cleared the code from 02 reader and now there's no hesitation across the line. my idle is ok at 600-700 on a stop.

I'll see when the code will come back...i'll try spark plug and coil swap.
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Old 06-21-2013, 10:09 AM   #9
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Quote:
Originally Posted by spec04 View Post
i have the same issue...at first i had the MAF problem so it stated with codes p0113 and p0102. i purchased a new one (aftermarket) and it cleared the problem. no more SES then after a few miles of driving the SES came back on. Went back to the mechanic and NOW p0300 code came. I did feel a hesitation between 3500-4000. Mechanic cleared the code from 02 reader and now there's no hesitation across the line. my idle is ok at 600-700 on a stop.

I'll see when the code will come back...i'll try spark plug and coil swap.
WTF??!
2009

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Old 08-09-2013, 04:29 PM   #10
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I've got this P0300 and p1448, p0430, p0455, p1448, p0011. I replaced both camshaft position sensors and just bought some NGK plugs to put in. My idle is s*** and I wanna solve that before I move onto the evap leak.
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Old 08-09-2013, 04:48 PM   #11
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Old 08-09-2013, 04:48 PM
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